Heat-transmitting elements of steam-generators.



KARL PRINZ ZU LOEWENSTEIN.

HEAT TRANSMITTING ELEMENTS 0F STEAM GENERATORS. APPLICATION FILEDHUNE 23. 1914.

1 ,1 62,626. Patented Nov. 30, 1915.

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when they are only KARL PRINZ ZU LOEWENSTEIN, 0F NECKAR-GEMUND, GERMANY.

HEAT-TRANSMITTING ELEMENTS 0F STEAM-GENERATORS.

Application filed .Tune 23, 1914.

To (ZZZ whom it may concern:

Be it known that I, KARL PRINZ ZU Lonw- ENSTEIN, a citizen of the German Empire, residing at Neckargemiind, in the Grand Dukedom of Baden, Germany, have invented certain new and useful Improvements in or in Connection with Heat-Transmitting Elements of Steam-Generators; and I do hereby declare the following to be a full, clear, and exact description of the invention,

'such as will enable others skilled in the art to which it appertains to make and use the same. i

This invention has for its object an arrangement for insuring and controlling the filling of heat transmitting elements of steam generators with liquid, While they are in operation, and for ascertaining Whether they have sustained any damage. For this purpose all the said elements are connected to a common feed pipe, and a shut-off cock. formed as a three-way cock is inserted in the pipe which connects the separate elements with the feed pipe. One of the passages of this cock is adapted to connect with an expansion vessel. This arrangement allows each separate transmission element to be examined to see whether it is damaged, when the other elements are shut off from the feed pipe, as the expansion vessels of those elements can receive any excess of liquid pumped in. It also allows a?) z'm'tio of the most economically favorable filling of the separate elements. As is well known, heat transmitting elements work best to filled with liquid, because then the steam bubbles formed carry the liquid at higher speed upward in the lift pipe, so that a much more vigorous circulation of the water in the elements takes place, than when they are quite full. Now it is usually almost impossible exactly to determine when an element is about two-thirds filled with water; the arrangement according to this invention, however, enables the elements to" be first of all completely filled with liquid, as the expansion vessel connected when at work with the element may be of such dimensions that it is adapted to receive to lof the total liquid contents of a heat-transferring element, whereupon after some time the expansion vessel is shut ofi' from the element and discharged into the feed pipe.

When in operation the three-way cock is Specification of Letters Patent.

Patented Nov. 30, 1915. Serial No. 846,749.

first so turned that the feed pipe is directly connected with the heat-transmitting element, whereupon the latter is entirely filled with liquid through the pressure pipe, which may be ascertained by the manometer of the pressure pump employed for filling the elements indicating an excess of pressure. The three-way cock is then turned so as to place the expansion vessel in communication with the heat-transmitting element, so that during the working the liquid expands into this vessel. After a certain pe riod of operation when all the excess liq uid has passed over into the expansion vessel, the three-way cock is turned so that the expansion vessel may discharge into the feed-pipe, while the transmitting element which now only contains about of the liquid originally introduced operates inde pendently. vVhen the liquid elements are to be examined for leakage or to ascertain the degree of filling, all the elements are shut off from the feed pipe with the exception of the one to be tested, and the filling of this element is commenced, whereupon it can be easily seen from the manometer of the pres sure pump whether the element leaks or otherwise.

The invention will now be more particularly described, in one form of construction as an example, with reference to the accom panying drawings, in which- Figure 1 shows the improved arrangement diagrammatically in elevation; Fig. 2, a side view of the same; and Fig. 3, an illustration on an enlarged scale of the arrangement of the expansion vessel.

The general arrangement of the steam boiler with apparatus for transmitting heat to a distance is the ordinary one.

The steam boiler a and the furnace flue b are connected with one another by means of the heat-transmitting elements 0, any suitable number of tubes being combined to form a heat transmitting element.

Now in accordance with this invention, the separate tubular elements 0 are connected by means of a pipe cl, with a common feed-pipe e, which connects with the pressure chamber of a pump f, provided with a manometer z. A three-way cock 9 is arranged on each pipe (Z in such a way that both the element 0 and also the pipe 6 may be put into communication with the vessel it for receiving the surplus liquid. This vessel h is of such dimensions that it can take about one third of the total liquid contents of one heat transmitting element.

When the apparatus is to be operated, the elements are filled until the manometer i at the pump 7 indicates superpressure. 'lhe three-way cock 9 is then turned in such a Way that the pipe 6 is shut ofi from the elements 0, While the elements a and the vessels 7?, remain in communication. When the boiler a is set in operation or is in operation all surplus water flows from the tubular elements 0 into the vessels h, from which it can be let 015? by further turning the three-way cock g.

By this arrangement uncertainty and ignorance as to whether all the elements are filled is removed, and any little defects in the elements which may exist or develop during the working can be eventually found or overcome without interrupting the workin By means of the improved arrangement defective elements may also be discovered from the others, as by closing or opening the separate cocks it can easily be ascertained to which element water from the boiler is leakin Finally, it is possible to regularly let off gases formed by the decomposition of the water, the formation of which gasescan easily be ascertained at the manometer of the pressure pump by the rise of pressure.

Instead of connecting all the heat transmitting elements together to a common feed pipe, this may also be done in groups. This must more particularly be the case when for example copper pipes are employed for the elements lying at the rear ends of the furnace flue, which pipes cannot endure the high pressure of the front elements which may possibly be communicated to them, and which therefore require to be connected to a separate pressure vessel. e

I declare that what I claim is 1. In a steam generator having tubular heat-transmitting elements connecting the steam boiler and the furnace flue, and fed with liquid from a common feed-pipe, the arrangement for controlling the filling of the said elements and testing them comprising pipes connecting the heat-transmitting elements with the common feed pipe; an expansion vessel adapted to be placed in communication with each heat-transmitting element in order to receive surplus liquid therefrom and to discharge it into the said feed pipe; and cooks for controlling these various connections and for enabling each heattransmitting element to be independently connected with the feed-pipe while shutting off the others therefrom.

2. In a steam generator having tubular heat-transmitting elements connecting the steam boiler and the furnace flue and fed with liquid from a common feed-pipe, the arrangement for controlling the filling of the said elements and testing them, comprising pipe connections between each heattransmitting element and the common feed pipe; an expansion vessel adapted to be placed in communication with each of said elements in order to receive surplus liquid therefrom and to discharge it into the said feed-pipe; and three-way cocks on the said pipe connections for controlling communication between the heat-transmitting elements, the feed pipe, and the expansion vessels, and for enabling each heat-transmitting element to be independently connected with the feed pipe while shutting off the others therefrom.

3. In a steam generator having tubular heat-transmitting. elements connecting the steam boiler and the furnace flue and fed with liquid from a common feed-pipe, the arrangement for controlling the lilling of the said elements and testing them, comprising pipe connections between the said feed pipe and the separate heat-transmitting elements, a three way cock located between each of said pipe connections and the feed pipe; and an expansion vessel in connection with each cock which can. be placed by said cock in communication with each heat-transmitting element to receive surplus liquid therefrom, and afterward placed in communication with the common feed pipe to discharge the surplus liquid thereinto.

In testimony whereof I affix my signature, in presence of two witnesses.

KARL IltINZ ZU LOEWENSTEIN.

WVitnesses:

HENRY HAsPnR, VVOLDEMAR HAUPT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

